Home / 578,731.80-869,428.13-408,345.67

Finding the Fourth Proportional to 578,731.80, 869,428.13 and 408,345.67

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Solution

The fourth proportional to 578,731.80, 869,428.13 and 408,345.67 is: 613,457.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,731.80 : 869,428.13 = 408,345.67 : x
  2. Step 2: Convert to fraction form
    578,731.80/869,428.13 = 408,345.67/x
  3. Step 3: Cross multiply
    578,731.80x = 869,428.13 × 408,345.67
  4. Step 4: Simplify right side
    578,731.80x = 355,027,212,261.70
  5. Step 5: Solve for x
    x = 355,027,212,261.70/578,731.80
  6. Step 6: Final answer
    x = 613,457.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.